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(I. P. SIVHTH.

INTAKE MANIFOLD APPuc/mon man MAYZ. 191a.

1,3053%. iatented May-27,1919,

C) C) vii? INVENTOH ATTO H N EY ill"? mumawmmlmkmmw CLAYYEQIQ' P. S 21TH, Q75 IU'WA CITY, Iillii specification of Letters Patent.

Patented May 27, 191.5%.

original application file l January 26, 191?, Serial No. 144,766. I ivided and this application filed May, 72,

bustion engines and is a division of my (10- pending application Jan. as, 1917. M

Theprimary object of the invention is to provide in a device of the character de scribed, a' manifoldconstrnoted in. such a manner that the charge passing therethrough will be thoroughly mixed and va- Serial #144,706, filed 'porized before being admitted into the engine cylinder; thus insuring the introduc tiori of a proper and uniform mixture into all of the cylinders and preventing the premature fouling of the spark plugs of certain of the cylinders by, the introduction therein of an excessively ."rich mixture in proportion to the mixtures introduced into the remaining cylinders.

Another object of the invention is to so construct the manifold that the cost of pro ducing the same will be but slightly higher than the cost of the manifolds now in use, and which present such advantages as will more than compensate for this slightly increased cost. I

A still further object of the invention re sides in the provision of a mixing device of this character, the principles of which are applicable wherever a mixing or vaporizing attachment for gaseous fuel charges may he used.

Other objects of the invention as Well as the specific details of construction and arrangement thereof Will be more readily understoodfrom the following description and accompanying drawings, in which Figure l is a view, partly in section and partly in elevation illustrating a manifold constructed in accordance with the principles of my invention.

Fig. 2 is a transverse sectional view on the line 2-2 of Fig. l.

Fig. 3 is an end elevation of the lower por tion of the manifold in. detached position.

The manifold indicated at l, is of the Serial No. 23%,050.

usual T configuration commonly employed, in connection with gasolcnc motors, audits stem is provided at its lower end with a hori zontally disposed portion 2 as is usual with devices of this character. I

My invention resides in providing the manifold with a plurality of spacedribs 3 which are preferably formed integral with the inner Wall of the manifold substantially as shown in Figs; 1 and 2. These ribs have their inception at the open extremity of the horizontal portion 2, and extends substantially in spaced parallelism with one another to the point Where the horizontal portion 2 is connected with the vertical portion or stem of the T-shaped manifold 1. Here the ribs 3 are bent to extend upwardly and spirally along the inner Wall of said stem in spaced relation to one another substantially as shown in Fig. 1. By this arrange ment, the mixing of the charge admitted into the manifold does not begin until the said charge has passed beyond the horizontal portion 2 and is about to pass upwardly through the stem-hence there is no resistance ofiercd to the entrance of the charge at the open extremity of the lforizont-al portion 2, as would be the case if the ribs were spirally twisted throughout their entire length. These ribs have a tendency to retard the passage of the charge through the intake manifold while imparting helical movement thereto, and consequently by having the helically twisted portion of the rib spaced from the inlet end of the manifold, this retarding of the passage of the charge Will not have any effect upon the admission of the fuel from the carburetor.

In practice, the charge admitted in the carburetor feed pipe designated at 4, is freely admitted into the horizontal portion 2 of the manifold. As this charge begins to ascend the-stem, l10\VGVOI,tll(5 spirally twisted ribs extending along the inne1' \vall of this portion will impart a whirling movement tothe charge and will. thus insure a proper mixture and vaporization of the same before admission into the engine cylinder. In this manner each cylinder of the engine will receive a. charge of exactly the same mixture as that received by the remain ing cylinders, and consequently the premalit is pointed I manifold, the ehzirge is admitted to the ryl-- inders in hllCll a way that the first cylinder receives the riehest mixture and consequenlly the spark plug of this cylinder is frequently fouled by the dvpoaits oli can-hon upon ihe vontm't points thereof. The present invention overcomes such an ohjeiiion as Set forth above.

Having thus fully described my invention whet iii claim as new and desire lo secure by Letters Patent, isz- The herein described iniake manifold of T-slnipe whose stein hesa horizontal exten- BlOIl at its; lower end communicating with the mixture inlet pipe, and a plurality of spared ribs projecting from the wall into mid extension and running parallel with each other and straight throughout the length 01' said extension, then bent at the angle between said extension and the stem of the structure and carried upwardly in said stem, and disposed spirally throughout the length'of the letter.

In testimony whereof I (tfliX my sigmiture in presence of two witnesses.

CLAYTON P. SMITH.

Witnesses: V

B. N. BRIDENSTINE, G. F. DOBRY. 

